Jump to content
Do Not Sell My Personal Information


  • Join Toyota Owners Club

    Join Europe's Largest Toyota Community! It's FREE!

     

     

Car Alarm


david61
 Share

Recommended Posts

My car alarm seems to go off for no reason whatsoever. No one tampering with it or sitting inside when doors locked

Link to comment
Share on other sites


My car alarm seems to go off for no reason whatsoever. No one tampering with it or sitting inside when doors locked

Car alarm has ultrasonic sensors. Have you anything in the car that can move. eg seat belts not stored properly, dangling ornaments, loose wires or leaving a window partially open. Any electrical equipment causing a voltage drop. Fitter

Link to comment
Share on other sites

As already mentioned by fitter, the alarm works on a voltage drop several other causes could be a cell down in the Battery or a bad earth causing a voltage leak, i think i would start by having the Battery checked and a good garage could also diagnose a possible bad earth.

Link to comment
Share on other sites

One of the most common faults on any alarm system is due faulty bonnet switches.

Check it out first - if necessary tape in down as a test.

Next if there any interior sensors also tape over them.

If neither pf these help then the problem lies elsewhere.

Also check the Battery conections are clean and sound.

Are any additional electrics or electronics fitted (phone connections, etc.) - if so temporary disconnect them.

All these checks can be done easily and cheaply and although may not dure the problem it will help narrow the search.

Link to comment
Share on other sites

Even something as simple as a lone fly in the car can set it off. I know as I had that problem for several days until I spotted it. A bit annoying but relieved it didn't cost me anything!

Link to comment
Share on other sites


My alarm used to go off randomly. Went to check the Battery life, it was very low, so after changing to the new one everything is fine.

Link to comment
Share on other sites

  • 1 month later...

Will a fast temperature rise or heat eddy currents trigger the ultrasonic sensor?

Link to comment
Share on other sites

Will a fast temperature rise or heat eddy currents trigger the ultrasonic sensor?

No its a voltage drop or vibration that triggers the alarm.

Link to comment
Share on other sites

Is the vibration sensor adjustable? it was a bit windy one day it when off.

Link to comment
Share on other sites

A car going by at speed can trigger the alarm, but i would think if its going off regular i would be looking for a voltage drop.

Link to comment
Share on other sites

You can temporarily disable the interior sensors to eliminate them. There should be a button near the front interior light to disable them.

Link to comment
Share on other sites

  • 8 months later...

Hi

Wwhen I had a 2009 Avensis I had a problem when it rained heavily, not water getting in , but dealer knew of a problem with the new model and fitted insulation to the alarm module thta cured it.

Only ever went off when it rained hard, info was passed via the dealer network, not by Toyota.

Link to comment
Share on other sites

Latest Deals

Toyota Official Store for genuine Toyota parts & accessories

Disclaimer: As the club is an eBay Partner, The club may be compensated if you make a purchase via eBay links

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share






×
×
  • Create New...




Forums


News


Membership


  • Insurance
  • Support